How can you use the pattern in the table of combinations to find a number in pascals triangles

The pattern in the table of combinations can be used to find a number in Pascal's triangle because each number in the triangle is the sum of the two numbers above it. For example, the number six is in the center of row four: which is the sum of three and three in the row above it. The very first and very last number in any row are always going to be one.